The restyling market experienced a steady decline in sales at the retail level from 2007 through 2009, according to SEMA research, going from $4.23 billion in 2007 to $3.79 billion in 2009. The main factor contributing to the fall in the market was the recession, which led to a major decline in vehicle sales. With available vehicle inventory on the downturn, a factor that may not adversely affect the more traditional specialty automotive markets, the decline changed the landscape of the restyling market. For OEMs, assembly lines were streamlined, factories were closed, trim levels were reduced or reconfigured, and the once lengthy list of available accessory options was scaled back.